where i was wrong, i've tried to correct myself. >> sreenivasan: texas governor rick perry, meanwhile, made an unusual appeal to religious voters, likening himself to denver broncos quarterback tim tebow, whose born-again christian faith has been well publicized. >> i hope i am the tim tebow of the iowa caucuses. >> sreenivasan: with recent polls in iowa showing the race there narrowing, the contest could still be anyone's game. >> lehrer: and to the analysis of shields and brooks-- syndicated columnist mark shields, "new york times" columnist david brooks. ings mark, last night, gingrich was clear the major tearing of just about everybody. how did he go through it? >> well, jim, there's a great question. if it's a two-candidate race, it's shields against brooks, shields attacks brooks, and either brooks benefits from the attack or he's hurt by the attack. but when you get lehrer in and get seven people, and the attack is made, then you don't know who the beneficiary is. in other words, romney did not go after gingrich last night. >> mary: he stayed away. >> michele bachmann i thought